Boiler-furnace.



H. A. BUCK.

BOILER FURNACE.

(Application filed Sept. 11, 1900.)

QQXRQ No. aesJsa.

(No ma.)

TNE MoRms PETERS co. PNOTO-L|TMO., WASHINGTON, n. c

NITED STATES PATENT Creme.

HENRY ALONZO BUCK, OF STAFFORD, CONNECTICUT.

BOILER-FURNACE.

SPECIFICATION forming part of Letters Patent No. 666,181, dated. January15, 1901.

Application filed September 11, 1900. derial No; 29,676. (No model.)

To all whom it may concern:

Be it known that I, HENRY ALONZO BUoK, engineer, a citizen of the UnitedStates of America, residing at West Stafiord, Connecticut, have inventednew and useful Improvements in Boiler-Furnaces for Compound Engines, ofwhich the following is a specification.

My invention relates to boilenfurnaces for compound engines, and itsessential feature is that besides the ordinary pipe arrangements ofsteam-boilers it is provided with a special tubular device connectedwith the receiver of the compound engine in such a manner that the steamarriving from the highpressure cylinderis passed back again to thegenerator with a view of being reheated.

. The invention is represented in the accompanying drawing, which is asection through a boiler.

a is the fire-box of the steam-generator; b, the fire-grate; c, theair-supply pipe; d, the discharge-passage for the fire-gases; g, thesupply-pipe of the high-pressure steam or of the hot Water, which may beconverted into steam of the required pressure before entering thehigh-pressure cylinder.

The discharge from the boiler is effected at e and the steam or the hotwater may be still further dried or heated, respectively, by pass ing itthrough a tubular arrangement f. The pipe g, taking the steam or hotWater to the high -pressure cylinder, passes through the passage 01,which is continued close up to the engine in such a manner that alllossof heat is avoided.

I According to the present invention the steam passing out from thehigh-pressure cylinder passes through the pipe t', which is also placedin the said passage d and terminates at the rear part of the boiler withwhich it communicates. From here this steam passes through a serpentinepipe k, arranged close behind the fire-box, and hence through anotherserpentine pipe arranged on the top of the boiler, and finally through apipe m to the low-pressure cylinder. This pipe we, like the pipe t', isalso situated in the passage d, so that any loss of heat is not onlyavoided, but, on the contrary, heat is added.

It should be specially'remarked here that the steam-pipe 2', throughwhich the steam leaving the high-pressure cylinder passes, is firstpassed through the lower draft-conduit of the firebox-21 e. into theplace where the temperature is highest around the boilerand onlyafterward into a boiler zone through which the fire-gases pass afterhaving been already deprived of the greater part of their heat.

I claim- 1. In a boiler-furnace for compound engines the combinationwith a passage (1 conducting the gases of combustion to the e11- gine ofa pipe such as i placed within the passage (1 and conducting the steamfrom the high-pressure cylinder to a chamber or serpentine pipe Itinside the furnace and a pipe m also within the passage (1 andconducting the steam from said serpentine pipe to the lowpressurecylinder substantially as described.

2. In a boiler-furnace for compound engines the combination with apassage d conducting the gases of combustion to the engine of a pipesuch as 2' placed within the passage d and conducting the steam from thehigh-pressure cylinder to a chamber or serpentine pipe is inside thefurnace and a pipe m also within the passage 01 and conducting the steamfrom said serpentine pipe to the low-pressure cylinder and a pipe suchas c surrounded by the passage dand conducting the incoming air to thefire-grate substantially as described.

3. In a boiler-furnace for compound engines the combination with apassage (1 conducting the gases of combustion to the engine of a pipesuch as i placed within the passage d and conducting the steam from thehigh-pressure cylinder to a chamber or serpentine pipe is inside thefurnace and a pipe m also within the passage (1 and conducting the steamfrom said serpentine pipe to the low-pressure cylinder and a pipe suchas c surrounded by the passage 01 and conducting the incoming air to thefire-grate, and a pipe g conducting the hot Water or the steam from theboiler and arranged within the passage 11 substantially as described.

i. In a boiler-furnace for compound engines the combination with apassage (1 conducting the gases of combustion to the engine of a pipesuch as 11 placed within the surrounded by the passage 01 and conductingthe incoming air to the fire-grate and a pipe 9 for the hot water orsteam and a pipe h for 10 the water-supply both pipes g and h beingplaced within the passage (1 substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HENRY ALONZO BUCK.

Witnesses:

WOLDEMAR HAUPT, HENRY HASPER.

